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Finding the Fourth Proportional to 1,921.47, 2,881.83 and 672.24

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Solution

The fourth proportional to 1,921.47, 2,881.83 and 672.24 is: 1,008.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.47 : 2,881.83 = 672.24 : x
  2. Step 2: Convert to fraction form
    1,921.47/2,881.83 = 672.24/x
  3. Step 3: Cross multiply
    1,921.47x = 2,881.83 × 672.24
  4. Step 4: Simplify right side
    1,921.47x = 1,937,281.40
  5. Step 5: Solve for x
    x = 1,937,281.40/1,921.47
  6. Step 6: Final answer
    x = 1,008.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.